Abstract
Boreal forests play an important role in the global balance of energy and CO2. Our previous study of elaborate eddy covariance observations in a Siberian boreal larch forest, conducted both above the forest canopy and at the forest floor, revealed a significant contribution of latent heat flux (LE) from the cowberry understory to the whole ecosystem LE. Thus, in the present study, we examined what factors control the partitioning of whole ecosystem LE and CO2 flux into the understory and overstory vegetation, using detailed leaf-level physiology (for both understory and overstory vegetation) and soil respiration property measurements as well as a multilayer soil-vegetation-atmosphere transfer (SVAT) model. The modeling results showed that the larch overstory's leaf area index (LAI) and vertical profile of leaf photosynthetic capacity were major factors determining the flux partitioning in this boreal forest ecosystem. This is unlike other forest ecosystems that tend to have dense LAI. We concluded that control of the larch overstory's LAI had a relationship with both the coexistence of the larch with the cowberry understory and with the water resources available to the total forest ecosystem.
| Original language | English |
|---|---|
| Pages (from-to) | 1479-1490 |
| Number of pages | 12 |
| Journal | Ecological Modelling |
| Volume | 222 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Apr 24 2011 |
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All Science Journal Classification (ASJC) codes
- Ecological Modelling
Cite this
Influences of canopy structure and physiological traits on flux partitioning between understory and overstory in an eastern Siberian boreal larch forest. / Xue, Bao Lin; Kumagai, Tomo'omi; Iida, Shin'ichi; Nakai, Taro; Matsumoto, Kazuho; Komatsu, Hikaru; Otsuki, Kyoichi; Ohta, Takeshi.
In: Ecological Modelling, Vol. 222, No. 8, 24.04.2011, p. 1479-1490.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Influences of canopy structure and physiological traits on flux partitioning between understory and overstory in an eastern Siberian boreal larch forest
AU - Xue, Bao Lin
AU - Kumagai, Tomo'omi
AU - Iida, Shin'ichi
AU - Nakai, Taro
AU - Matsumoto, Kazuho
AU - Komatsu, Hikaru
AU - Otsuki, Kyoichi
AU - Ohta, Takeshi
PY - 2011/4/24
Y1 - 2011/4/24
N2 - Boreal forests play an important role in the global balance of energy and CO2. Our previous study of elaborate eddy covariance observations in a Siberian boreal larch forest, conducted both above the forest canopy and at the forest floor, revealed a significant contribution of latent heat flux (LE) from the cowberry understory to the whole ecosystem LE. Thus, in the present study, we examined what factors control the partitioning of whole ecosystem LE and CO2 flux into the understory and overstory vegetation, using detailed leaf-level physiology (for both understory and overstory vegetation) and soil respiration property measurements as well as a multilayer soil-vegetation-atmosphere transfer (SVAT) model. The modeling results showed that the larch overstory's leaf area index (LAI) and vertical profile of leaf photosynthetic capacity were major factors determining the flux partitioning in this boreal forest ecosystem. This is unlike other forest ecosystems that tend to have dense LAI. We concluded that control of the larch overstory's LAI had a relationship with both the coexistence of the larch with the cowberry understory and with the water resources available to the total forest ecosystem.
AB - Boreal forests play an important role in the global balance of energy and CO2. Our previous study of elaborate eddy covariance observations in a Siberian boreal larch forest, conducted both above the forest canopy and at the forest floor, revealed a significant contribution of latent heat flux (LE) from the cowberry understory to the whole ecosystem LE. Thus, in the present study, we examined what factors control the partitioning of whole ecosystem LE and CO2 flux into the understory and overstory vegetation, using detailed leaf-level physiology (for both understory and overstory vegetation) and soil respiration property measurements as well as a multilayer soil-vegetation-atmosphere transfer (SVAT) model. The modeling results showed that the larch overstory's leaf area index (LAI) and vertical profile of leaf photosynthetic capacity were major factors determining the flux partitioning in this boreal forest ecosystem. This is unlike other forest ecosystems that tend to have dense LAI. We concluded that control of the larch overstory's LAI had a relationship with both the coexistence of the larch with the cowberry understory and with the water resources available to the total forest ecosystem.
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UR - http://www.scopus.com/inward/citedby.url?scp=79953026856&partnerID=8YFLogxK
U2 - 10.1016/j.ecolmodel.2011.01.021
DO - 10.1016/j.ecolmodel.2011.01.021
M3 - Article
AN - SCOPUS:79953026856
VL - 222
SP - 1479
EP - 1490
JO - Ecological Modelling
JF - Ecological Modelling
SN - 0304-3800
IS - 8
ER -